Yes, it is a CS download. Unpack it into the Morrowind directory without a CS installed (with or without expansions) and you can create playable mods with it. Try it and see.
First of all, the file doesnt seem to exist anymore.
If it did exist however, you will be able to create playable mods, but you will not be able to use the CS with bloodmoon.esm. It will crash. I already explained it in this thread:
http://www.gamesas.com/bgsforums/index.php?showtopic=1073542